Sound-generating devices and electronic equipment

Abstract

The present invention discloses a sound-generating device and electronic device, relating to the field of electroacoustic transducer technology. The sound-generating device includes a housing, a magnetic circuit system, a vibration system, and a support member. The vibration system is arranged on one side of the magnetic circuit system. The vibration system includes a diaphragm, a skeleton, a voice coil, and a centering support. The diaphragm is connected to the housing and the skeleton respectively. One end of the voice coil is connected to the skeleton, and the other end is arranged corresponding to the magnetic gap of the magnetic circuit system. The skeleton is provided with a magnetic material coating as a first magnetic attraction portion. The centering support member is respectively connected to the end of the skeleton away from the diaphragm and the housing. At least part of the support member is located on the side of the diaphragm facing away from the magnetic circuit system and is provided with a permanent magnet as a second magnetic attraction portion. A first attraction force exists between the first magnetic attraction portion and the second magnetic attraction portion, and a second attraction force exists between the first magnetic attraction portion and the magnetic circuit system. When not in operation, the vibration system is in an equilibrium position under the action of the first attraction force and the second attraction force. The technical solution of the present invention can improve the low-frequency effect and acoustic performance of the sound-generating device.

Description

Technical Field

[0001] The present invention relates to the technical field of electroacoustic transducer technology, and in particular to a sound-generating device and an electronic device. Background Art

[0002] In recent years, consumer electronics have experienced rapid development, with smartphones, VR devices, and other electronic devices gaining widespread consumer acceptance. Technicians in this field have also developed improvements to related supporting products, such as speakers, to meet the sound performance requirements of electronic products and satisfy consumer demand for product performance.

[0003] Sound-generating devices are important electroacoustic transducers in electronic products, widely used in applications such as speakers, receivers, and headphones. As electronic product performance improves, improvements in the acoustic performance of sound-generating devices are inevitable. In theory, the low-frequency loudness of a sound-generating device is closely related to the maximum amount of air its vibration system can displace (the product of maximum amplitude and effective vibration area). To meet acoustic performance requirements, a larger vibration volume must be reserved to accommodate large amplitudes.

[0004] As the demand for thinner and lighter electronic devices becomes increasingly higher, the assembly space left for micro-sound devices in electronic devices is getting smaller and smaller. When a larger vibration space is reserved, the space available for installing the magnetic circuit system is also relatively smaller, resulting in a reduction in the volume of the magnets in the magnetic circuit system, thereby reducing the BL value of the product. As a result, even if a larger vibration space is reserved, it is difficult for the diaphragm to reach the maximum amplitude, affecting the acoustic performance of the sound device. Summary of the Invention

[0005] The main purpose of the present invention is to propose a sound-producing device and an electronic device, which aims to introduce static magnetotropy into the vibration system by providing a first magnetic attraction portion and a second magnetic attraction portion, and reduce the stiffness of the vibration system through the static magnetotropy, thereby significantly improving the low-frequency effect of the sound-producing device. By using a skeleton to connect the voice coil and the centering support, the volume of the magnet in the magnetic circuit system can be increased, the BL value of the product can be increased, and the acoustic performance of the sound-producing device can be improved.

[0006] To achieve the above-mentioned purpose, the sound-generating device proposed in the present invention comprises:

[0007] shell;

[0008] A magnetic circuit system, the magnetic circuit system comprising a central magnetic portion and side magnetic portions spaced apart from each other, wherein the central magnetic portion and the side magnetic portions are spaced apart from each other to form a magnetic gap;

[0009] a vibration system disposed on one side of the magnetic circuit system, the vibration system comprising a diaphragm, a skeleton, a voice coil, and a centering support, wherein the outer edge of the diaphragm is connected to the housing, the inner edge of the diaphragm is connected to the skeleton, one end of the voice coil is connected to the skeleton, and the other end of the voice coil is arranged corresponding to the magnetic gap; the centering support is opposite to the diaphragm and spaced apart, one end of the centering support is connected to an end of the skeleton away from the diaphragm, and the other end of the centering support is connected to the housing; and

[0010] a support member, at least a portion of which is located on a side of the vibration system facing away from the magnetic circuit system;

[0011] In which, the skeleton is provided with a first magnetic attraction part, the first magnetic attraction part includes a magnetic material coating provided on the surface of the skeleton, the support part is provided with a second magnetic attraction part, the second magnetic attraction part is a permanent magnet, there is a first attraction force between the first magnetic attraction part and the second magnetic attraction part, there is a second attraction force between the first magnetic attraction part and the magnetic circuit system, and in a non-working state, the vibration system is located in a balanced position between the second magnetic attraction part and the magnetic circuit system under the action of the combined force of the first attraction force and the second attraction force.

[0012] In one embodiment, the first magnetic attraction portion is provided on a surface of the frame facing the second magnetic attraction portion;

[0013] And / or, the first magnetic attraction portion is provided on a surface of the skeleton facing the magnetic circuit system.

[0014] In one embodiment, the skeleton includes a main body structure and at least two connecting structures, the main body structure is connected to the diaphragm, one end of the connecting structure is connected to the main body structure, and the other end of the connecting structure is bent and extended in a direction away from the diaphragm to be connected to the centering support plate, and the magnetic material coating is provided on the surface of the main body structure.

[0015] In one embodiment, the main body structure and the connecting structure are integrally formed; or, the main body structure and the connecting structure are separate structures connected to each other;

[0016] And / or, the sound-generating device has two short sides and two long sides that are arranged opposite to each other, and the frame includes two connecting structures, and the two connecting structures are respectively arranged on the two short sides or the two long sides;

[0017] And / or, a recessed portion is provided on a side of the main body structure facing the second magnetic attraction portion, the recessed portion is formed by the skeleton being recessed toward the central magnetic portion, and the first magnetic attraction portion is provided in the recessed portion;

[0018] Alternatively, the main body structure is provided with a hollow hole, the skeleton further includes a ball top portion, the ball top portion is provided on the main body structure and covers the hollow hole, and the first magnetic attraction portion is provided on the ball top portion;

[0019] And / or, a portion of the main body structure is recessed and extended toward the direction close to the magnetic circuit system to form a connecting frame, and one end of the voice coil close to the diaphragm is connected to the connecting frame.

[0020] In one embodiment, the edge magnet portion includes a stacked edge magnet and an edge magnetic conductive plate, wherein the edge magnetic conductive plate is provided on a side of the edge magnet facing the vibration system;

[0021] The centering support plate is arranged on a side of the edge magnetic conductive plate facing away from the diaphragm, and a gap is provided between at least a portion of the edge magnetic conductive plate and the shell, and the connecting structure is passed through the gap.

[0022] In one embodiment, the side magnetic conductive plate and the housing are integrally provided; or, the side magnetic conductive plate and the housing are separate structures connected to each other;

[0023] And / or, a first avoidance opening is provided on the side of the magnetic conductive plate facing the notch;

[0024] And / or, the edge of the side magnet is provided with a second avoidance opening for avoiding the connecting structure.

[0025] In one embodiment, the voice coil includes a voice coil body and a lead portion connected to the voice coil body. The voice coil body is connected to the frame. The connecting structure includes a first extension portion and a second extension portion. Two ends of the first extension portion are respectively connected to the body structure and the second extension portion. At least a portion of the first extension portion extends along the vibration direction of the vibration system. The second extension portion is arranged at an angle to the first extension portion and is connected to the centering plate.

[0026] The lead portion is arranged along the connecting structure, and includes a first lead wire routed along the first extension portion and a second lead wire routed along the second extension portion. The centering support piece is provided with a conductive portion, and the second lead wire is connected to the conductive portion.

[0027] In one embodiment, the voice coil includes a voice coil body and a lead portion connected to the voice coil body, the voice coil body is connected to the frame, the frame also includes a conductive layer, the centering support plate is provided with a conductive portion, and the lead portion and the conductive portion are respectively electrically connected to the conductive layer.

[0028] In one embodiment, the conductive layer is provided on the connecting structure, or the conductive layer is provided on the main structure and the connecting structure respectively;

[0029] And / or, the conductive layer is provided on the outer surface of the skeleton;

[0030] Alternatively, at least a portion of the skeleton is formed as a plastic structure, and the conductive layer is formed as a conductive circuit layer injection-molded inside the plastic structure.

[0031] In one embodiment, the voice coil includes a voice coil body and a lead portion connected to the voice coil body, the voice coil body is connected to the frame, and the centering support is provided with a conductive portion;

[0032] The main body structure is an insulating material piece, the connecting structure is a metal piece, and the connecting structure is electrically connected to the conductive part and the lead part respectively;

[0033] Alternatively, the skeleton includes two components made of metal materials, at least part of the connecting structure and part of the main body structure form the components, the two components are arranged separately, and each component is electrically connected to the conductive part and the lead part.

[0034] In one embodiment, there are two centering supports, one of which is provided with two conductive portions; or each of the centering supports is provided with a conductive portion;

[0035] The voice coil includes a voice coil body and two lead parts connected to the voice coil body. The voice coil body is connected to the frame, and each lead part is electrically connected to one of the conductive parts.

[0036] In one embodiment, a receiving space is defined between the housing and the magnetic circuit system, and the centering arm includes a first connecting portion, an elastic portion, and a second connecting portion that are connected to each other, the first connecting portion being connected to the housing, the elastic portion and the second connecting portion being located within the receiving space, and the frame being connected to the second connecting portion.

[0037] And / or, there are two centering supports, and the two centering supports are arranged on opposite sides of the frame.

[0038] In one embodiment, the magnetic circuit system further includes a magnetic yoke, the magnetic yoke including a main body and a bent portion provided on the outer periphery of the main body, the central magnetic portion and the edge magnetic portion are both provided on a side of the main body opposite to the vibration system, the bent portion bends and extends relative to the main body toward a direction close to the vibration system, and the bent portion, the housing, and the edge magnetic portion jointly define a storage space for arranging at least a portion of the centering support piece;

[0039] And / or, the central magnetic portion includes a central magnet and a central magnetic conductive plate arranged in a stacked manner, the central magnetic conductive plate is located on a side of the central magnet facing the vibration system, and along the vibration direction of the vibration system, the central magnetic conductive plate has a recessed area corresponding to the first magnetic attraction portion;

[0040] Part of the central magnetic conductive plate is recessed in a direction away from the vibration system to form the recessed area; or the recessed area is a through-hole structure penetrating the central magnetic conductive plate.

[0041] In one embodiment, the second attraction force exists between the first magnetic attraction portion and the central magnetic portion, and the magnetization direction of the second magnetic attraction portion is opposite to the magnetization direction of the central magnetic portion;

[0042] And / or, the second magnetic attraction portion is provided on a side of the support member facing the first magnetic attraction portion;

[0043] And / or, the second magnetic attraction portion is provided on a side of the support member facing away from the first magnetic attraction portion;

[0044] And / or, a mounting cavity is provided in the support member, and the second magnetic attraction portion is provided in the mounting cavity;

[0045] And / or, the second magnetic attraction portion is circular, elliptical or polygonal;

[0046] And / or, the second magnetic attraction portion is arranged opposite to the first magnetic attraction portion;

[0047] And / or, a mounting groove is provided on a side of the support member facing the diaphragm, and the second magnetic attraction portion is provided in the mounting groove;

[0048] And / or, there are at least two second magnetic attraction parts, and the at least two second magnetic attraction parts are arranged on the same side or different sides of the support member.

[0049] In one embodiment, the sound-generating device is provided with a front cover, which is located on a side of the vibration system facing away from the magnetic circuit system. The front cover forms the support member, and the outer edge of the diaphragm is connected between the front cover and the housing.

[0050] In one embodiment, the sound-emitting device includes a module shell, the module shell includes a module upper shell and a module lower shell covering each other, the module upper shell and the module lower shell enclose an installation space, the magnetic circuit system and the vibration system are arranged in the installation space, the module upper shell is located on the side of the vibration system facing away from the magnetic circuit system, the module upper shell forms the support member, and the second magnetic attraction part is arranged on the module upper shell.

[0051] The present invention further provides an electronic device, comprising the sound-generating device as described in any of the aforementioned embodiments.

[0052] The technical solution of the present invention is to arrange a magnetic material coating as a first magnetic attraction part on the skeleton of the vibration system of the sound-emitting device, and arrange a support member on the side of the vibration system facing away from the magnetic circuit system, and arrange a second magnetic attraction part on the support member, so that there is a first attraction force between the first magnetic attraction part and the second magnetic attraction part, and a second attraction force between the first magnetic attraction part and the magnetic circuit system. In this way, the first magnetic attraction part interacts with the second magnetic attraction part of the support member and the magnetic circuit system respectively, and a static magnetic force is introduced into the vibration system, thereby effectively reducing the strain recovery force of the vibration system during movement. The static magnetic force is used to reduce the stiffness of the vibration system, so that the compliance of the vibration system is better, which can greatly improve the low-frequency effect of the sound-emitting device.

[0053] In the present invention, the voice coil and the centering support are connected by a skeleton in the vibration system. With this arrangement, there is no need to extend the centering support to the position of the voice coil, so that the magnetic circuit system does not need to avoid the centering support in the vibration direction of the vibration system, thereby increasing the magnet setting volume of the magnetic circuit system, increasing the magnetic field strength of the magnetic circuit system acting on the vibration system, and increasing the BL value of the product, thereby improving the sensitivity of the sound-generating device and thus improving the performance of the sound-generating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0055] Figure 1 A cross-sectional view of a first embodiment of a sound-generating device provided by the present invention;

[0056] Figure 2 for Figure 1 A cross-sectional view of the sound-generating device from another perspective;

[0057] Figure 3 for Figure 1 Exploded view of the sound-generating device;

[0058] Figure 4 for Figure 1 Coordination structure diagram of the middle frame and centering support;

[0059] Figure 5 A cross-sectional view of a second embodiment of the sound-generating device provided by the present invention;

[0060] Figure 6 for Figure 5 A cross-sectional view of the sound-generating device from another perspective;

[0061] Figure 7 An exploded view of a third embodiment of the sound-generating device provided by the present invention;

[0062] Figure 8 An exploded view of a fourth embodiment of the sound-generating device provided by the present invention;

[0063] Figure 9 for Figure 8 Diagram of the voice coil, connection structure, and centering support structure of the central sounding device;

[0064] Figure 10 A cross-sectional view of a fifth embodiment of the sound-generating device provided by the present invention;

[0065] Figure 11 for Figure 10 Diagram of the coordinated structure of the voice coil, frame, and centering support of the central sounding device;

[0066] Figure 12 A structural diagram of an embodiment of a skeleton in a sound-generating device of the present invention;

[0067] Figure 13 An exploded view of two assembly parts of an embodiment of a skeleton of a sound-generating device of the present invention;

[0068] Figure 14 An exploded view of two assembly parts of another embodiment of the framework of the sound-generating device of the present invention;

[0069] Figure 15 This is a structural diagram of an embodiment of a centering support in a sound-generating device of the present invention;

[0070] Figure 16 This is a diagram showing the matching structure of the housing and the side magnetic conductive plate in one embodiment of the sound-generating device of the present invention;

[0071] Figure 17 A magnetostatic force curve diagram of the vibration direction of the sound-generating device in one embodiment of the present invention;

[0072] Figure 18 A stiffness curve diagram of the sound-generating device of the present invention and a conventional design;

[0073] Figure 19 This is a test chart of the frequency response performance of the sound-generating device of the present invention and the existing design.

[0074] Description of Figure Numbers:

[0075] 100. Sound-generating device; 1. Housing; 2. Magnetic circuit system; 21. Central magnetic portion; 211. Central magnet; 212. Central magnetic plate; 213. Recessed area; 22. Side magnetic portion; 221. Side magnet; 222. Side magnetic plate; 223. Notch; 224. First avoidance opening; 225. Second avoidance opening; 23. Magnetic yoke; 231. Main body; 232. Bend; 233. Accommodation space; 24. Magnetic gap; 3. Vibration system; 31. Diaphragm; 311. Inner ring hole; 32. Skeleton; 321. Main body structure; 3211. Recessed portion; 3212. Hollow hole; 3213. Connecting frame; 322. Connecting structure; 3221. First extension portion; 32 22. Second extension portion; 3223. Third extension portion; 323. First magnetic portion; 324. Conductive layer; 325. Dome portion; 326. Component portion; 33. Voice coil; 331. Lead portion; 3311. First lead; 3312. Second lead; 34. Centering support; 341. First connecting portion; 342. Elastic portion; 3421. First elastic arm; 3422. Second elastic arm; 3423. Third elastic arm; 343. Second connecting portion; 35. Conductive adhesive; 4. Support member; 41. Second magnetic portion; 42. Front cover; 421. Sound hole; 43. Module housing; 431. Module upper shell; 432. Module lower shell; 433. Installation space; 5. Mesh.

[0076] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0077] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0078] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0079] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0080] The present invention proposes a sound-generating device 100, which can be used in electronic devices. The electronic devices may be, but are not limited to, smart watches, smart glasses, head-mounted display devices, mobile phones, speakers, computers, headphones, or televisions.

[0081] See also Figures 1 to 4 In one embodiment of the present invention, the sound-generating device 100 includes a housing 1, a magnetic circuit system 2, a vibration system 3, and a support member 4. The magnetic circuit system 2 includes a central magnetic portion 21 and a side magnetic portion 22 spaced apart from each other, and the central magnetic portion 21 and the side magnetic portion 22 are spaced apart to form a magnetic gap 24. The vibration system 3 is disposed on one side of the magnetic circuit system 2. The vibration system 3 includes a diaphragm 31, a skeleton 32, a voice coil 33, and a centering support 34. The outer edge of the diaphragm 31 is connected to the housing 1, the inner edge of the diaphragm 31 is connected to the skeleton 32, one end of the voice coil 33 is connected to the skeleton 32, and the other end of the voice coil 33 is disposed corresponding to the magnetic gap 24. The centering support 34 is opposite to the diaphragm 31 and spaced apart from each other. One end of the centering support 34 is connected to the end of the skeleton 32 away from the diaphragm 31, and the other end of the centering support 34 is connected to the housing 1. At least a portion of the support member 4 is located on the side of the diaphragm 31 facing away from the magnetic circuit system 2.

[0082] Among them, the skeleton 32 is provided with a first magnetic attraction part 323, the first magnetic attraction part 323 includes a magnetic material coating provided on the surface of the skeleton 32, the support part 4 is provided with a second magnetic attraction part 41, the second magnetic attraction part 41 is a permanent magnet, there is a first attraction force between the first magnetic attraction part 323 and the second magnetic attraction part 41, and there is a second attraction force between the first magnetic attraction part 323 and the magnetic circuit system 2. When in the non-working state, the vibration system 3 is located in a balanced position between the second magnetic attraction part 41 and the magnetic circuit system 2 under the action of the combined force of the first attraction force and the second attraction force.

[0083] In an embodiment of the present invention, the sound-emitting device 100 can be a sound-emitting unit used as a loudspeaker, and can be used in conjunction with the housing or other components of an electronic device to form a sound cavity; the sound-emitting device 100 can also be a sound-emitting module structure, for example, a module housing 43 is provided to accommodate other components of the sound-emitting device 100 and form a sound cavity, so that the sound-emitting device 100 can be used alone as a sound-emitting device.

[0084] The sound-generating device 100 includes a housing 1 and a magnetic circuit system 2 and a vibration system 3 arranged relatively thereto; the housing 1 can provide an installation base for other components of the sound-generating device 100, and is used to install, fix and support other components of the sound-generating device 100, and the magnetic circuit system 2 and the vibration system 3 are respectively connected to the housing 1. The housing 1 can be an integral structure, or it can be formed by the cooperation of multiple separate structures. The housing 1 forms a cavity, and optionally, the housing 1 can be enclosed to form a closed cavity, or it can be enclosed to form a cavity with one end open or both ends through along the vibration direction; as in the illustrated embodiment, the housing 1 can be set as an annular frame or frame structure, for example, to form a square frame structure.

[0085] The magnetic circuit system 2 includes a central magnetic portion 21 and a side magnetic portion 22. The side magnetic portion 22 is arranged around the central magnetic portion 21, thereby forming a magnetic gap 24 between the central magnetic portion 21 and the side magnetic portion 22. The side magnetic portion 22 can be a closed-loop structure, or it can be composed of a plurality of sub-magnetic portions arranged at intervals along the circumference of the central magnetic portion 21. It should be noted that the connection method of the magnetic circuit system 2 and the housing 1 can be to provide a magnetic yoke 23 on the side of the magnetic circuit system 2 away from the vibration system 3, so that the magnetic yoke 23 is connected to the housing 1, and the central magnetic portion 21 and the side magnetic portion 22 are both fixed on the magnetic yoke 23; or it can be to connect the side magnetic portion 22 to the housing 1, and the central magnetic portion 21 is connected to the side magnetic portion 22 through the magnetic yoke 23. In addition, a mounting structure can be provided on the side of the magnetic circuit system 2 away from the vibration system 3. The mounting structure can be a part of the housing 1 or an independent component connected to the housing 1, and the magnetic circuit system 2 is fixed on the mounting structure to connect to the housing 1.

[0086] The vibration system 3 includes a diaphragm 31 and a voice coil 33. The outer edge of the diaphragm 31 is connected to the housing 1. Optionally, the diaphragm 31 may include a folded ring portion, a fixed portion connected to the outer edge of the folded ring portion, and a central portion connected to the inner edge of the folded ring portion. The fixed portion is connected to the housing 1. The folded ring portion has a convex structure that protrudes toward the side of the magnetic circuit system 2 or a convex structure that protrudes away from the magnetic circuit system 2. The central portion can be a complete diaphragm or can have an inner ring hole 311. When the inner ring hole 311 is provided, the inner ring hole 311 can be closed by covering the inner ring hole 311 with a dome or a frame 32. The voice coil 33 is connected to the side of the diaphragm 31 facing the magnetic circuit system 2. The contour of the voice coil 33 is adapted to the magnetic gap 24. The end of the voice coil 33 away from the diaphragm 31 is arranged corresponding to the magnetic gap 24 and can be inserted into the magnetic gap 24 or located outside the magnetic gap 24.

[0087] In this embodiment, to improve the stability of the vibration system 3 during the vibration process and avoid problems such as polarization, the vibration system 3 is further provided with a centering support 34 and a skeleton 32. One end of the skeleton 32 is connected to the diaphragm 31. The skeleton 32 mentioned in the embodiment of the present invention is connected to the inner edge of the diaphragm 31, and the skeleton 32 is connected to the central area of ​​the diaphragm 31, such as the central area mentioned in the aforementioned embodiment. When the diaphragm 31 has a complete diaphragm structure, the skeleton 32 is stacked with the diaphragm 31. When an inner ring hole 311 is opened in the middle of the diaphragm 31, the skeleton 32 is connected to the edge area of ​​the inner ring hole 311. The provision of the skeleton 32 can be used to improve the structural strength of the central area of ​​the diaphragm 31. The centering damper 34 is disposed opposite the diaphragm 31 and is located on the side of the diaphragm 31 facing the voice coil 33. The outer edge of the centering damper 34 is connected to the housing 1. The end of the bobbin 32, away from the diaphragm 31, extends toward and is connected to the centering damper 34. The end of the voice coil 33 facing the diaphragm 31 is connected to the portion of the bobbin 32 connected to the diaphragm 31, thereby connecting the voice coil 33 to the centering damper 34 via the bobbin 32. The centering damper 34 can be configured as a spring structure or, as in the following embodiment, can include a first connecting portion 341 connected to the housing 1 and an elastically deformable elastic portion 342. The centering damper 34 can elastically deform in response to the vibrations of the diaphragm 31 and voice coil 33.

[0088] By connecting the centering support plate 34 and the voice coil 33 through the skeleton 32, there is no need to extend the centering support plate 34 to the position of the voice coil 33 and connect with the voice coil 33. At this time, in the vibration direction of the vibration system 3, the magnetic circuit system 2 does not need to avoid the centering support plate 34, so the setting volume of the magnet in the magnetic circuit system 2 can be increased, so that the volume of the magnetic circuit system 2 is increased, which is beneficial to increase the magnetic field strength of the magnetic circuit system 2 acting on the vibration system 3, increase the BL value of the product, and enhance the sensitivity of the sound-generating device 100, thereby improving the performance of the sound-generating device 100.

[0089] The centering support 34 can be an annular structure arranged around the circumference of the voice coil 33; multiple centering supports 34 can also be arranged around the circumference of the voice coil 33. In this case, the centering supports 34 can be connected to each other, or two adjacent centering supports 34 can be arranged at intervals. For example, two centering supports 34 can be provided on opposite sides of the skeleton 32. The centering support 34 can be made of metal, plastic, or other materials, or a structure of at least two different materials can form the centering support 34. In addition, in some embodiments, the centering support 34 can be set to a conductive material, or a conductive circuit can be set on the centering support 34, so that the lead portion 331 of the voice coil 33 is electrically connected to the external circuit through the centering support 34, thereby improving the convenience of connecting the voice coil 33 to the power supply.

[0090] Optionally, the skeleton 32 can be integrally formed, or it can be composed of at least two separate structures connected to each other; the skeleton 32 can be made of metal, or other materials such as plastic or carbon fiber, or different structures of the skeleton 32 can be formed by at least two different materials, which is not specifically limited here.

[0091] Optionally, the outline of the magnetic gap 24 formed in the magnetic circuit system 2 can be set to be square, and the voice coil 33 of the vibration system 3 can also be set to be square, so that the voice coil 33 corresponds to the magnetic gap 24. For example, the central magnetic portion 21 and the side magnetic portion 22 of the magnetic circuit system 2 can both be set to be square. Alternatively, the central magnetic portion 21 can be square, the inner outline of the side magnetic portion 22 can be square, and the outer outline of the side magnetic portion 22 can be circular or other shapes. In addition, the magnetic gap 24 formed by the magnetic circuit system 2 can also be circular, elliptical, or other shapes.

[0092] In an embodiment of the present invention, a first magnetic attraction portion 323 is provided on the skeleton 32 of the vibration system 3. The first magnetic attraction portion 323 is a magnetic material coating provided on the surface of the skeleton 32, wherein the magnetic material coating is a mixture of magnetic conductive material particles and an adhesive, and the magnetic conductive material particles are at least one of iron powder, nickel powder, manganese zinc ferrite powder, nickel zinc ferrite powder, neodymium iron boron powder, aluminum iron boron powder, iron silicon powder, and iron silicon aluminum powder, which are not limited here. The first magnetic attraction portion 323 can be provided on the surface of the skeleton 32 facing the magnetic circuit system 2, or on the surface of the skeleton 32 facing away from the magnetic circuit system 2, or a magnetic material coating can be provided on both the surface of the skeleton 32 facing the magnetic circuit system 2 and the surface facing away from the magnetic circuit system 2. Using a magnetic material coating to form the first magnetic attraction portion 323 can make the overall mass of the sound-generating device 100 relatively light. A support member 4 is provided on the side of the diaphragm 31 facing away from the magnetic circuit system 2. The support member 4 is spaced apart from the diaphragm 31. A second magnetic attraction portion 41 is provided on the support member 4. The second magnetic attraction portion 41 is configured as a permanent magnet such as a magnet. The support member 4 can be a part of the housing 1 or a structure connected to the housing 1, such as the front cover 42 in the following embodiment. When the sound-generating device 100 is configured as a module structure, the upper shell 431 of the module can also be used as the support member 4. Of course, the structure of the support member 4 is not limited to the aforementioned structural design. The second magnetic attraction portion 41 can be connected to the support member 4, that is, the support member 4 is used to support and fix the second magnetic attraction portion 41. The second magnetic attraction portion 41 can be provided on the surface of the support member 4, or can be embedded in the support member 4, or the support member 4 itself can form the second magnetic attraction portion 41.

[0093] There is a first attraction force between the first magnetic attraction part 323 and the second magnetic attraction part 41; there is a second attraction force between the first magnetic attraction part 323 and the magnetic circuit system 2. When the sound-generating device 100 is in a non-working state, the vibration system 3 is located in a balanced position between the second magnetic attraction part 41 and the magnetic circuit system 2 under the action of the combined force of the first attraction force and the second attraction force; the total attraction force exerted on the first magnetic attraction part 323 can be used as a static magnetic force applied to the vibration system 3.

[0094] It can be understood that when the vibration system 3 is working, the resultant force of the first attraction and the second attraction is opposite to the direction of the strain recovery force of the vibration system 3 and is less than the strain recovery force of the vibration system 3; when the vibration system 3 stops working, the equivalent stiffness of the resultant force of the first attraction and the second attraction is not greater than the stiffness of the vibration system 3, thereby making the vibration system 3 located in an equilibrium position between the second magnetic attraction part 41 and the magnetic circuit system 2 under the action of the resultant force of the first attraction and the second attraction. Specifically, when the vibration system 3 is working, the first magnetic attraction part 323 reciprocates between the second magnetic attraction part 41 and the magnetic circuit system 2. When the first magnetic attraction part 323 approaches the second magnetic attraction part 41, it moves away from the magnetic circuit system 2, the attraction between the first magnetic attraction part 323 and the second magnetic attraction part 41 increases, and the attraction between the first magnetic attraction part 323 and the magnetic circuit system 2 decreases, and the resultant force of the first attraction and the second attraction is toward the direction of the second magnetic attraction part 41. When the first magnetic attraction portion 323 approaches the magnetic circuit system 2 , it moves away from the second magnetic attraction portion 41 , the attraction between the first magnetic attraction portion 323 and the second magnetic attraction portion 41 decreases, and the attraction between the first magnetic attraction portion 323 and the magnetic circuit system 2 increases, and the combined force of the first attraction and the second attraction is toward the direction of the magnetic circuit system 2 .

[0095] In specific applications, taking the vibration of the vibration system 3 in the up and down directions as an example, when the vibration system 3 moves in the direction close to the second magnetic attraction part 41, it is an upward movement, and when the vibration system 3 moves in the direction close to the magnetic circuit system 2, it is a downward movement. When the vibration system 3 is not working, the vibration system 3 is at the initial position. When the vibration system 3 is working, the voice coil 33 drives the diaphragm 31 to vibrate up and down, thereby the vibration system 3 vibrates up and down. When the vibration system 3 moves upward to above the initial position, the direction of the strain recovery force of the vibration system 3 is downward. At this time, the first suction force between the first magnetic attraction part 323 and the second magnetic attraction part 41 is greater than the second suction force between the first magnetic attraction part 323 and the magnetic circuit system 2. The resultant force of the first suction force and the second suction force is upward and less than the strain recovery force of the vibration system 3. At this time, the resultant force of the first suction force and the second suction force acts on the vibration system 3 to offset part of the strain recovery force of the vibration system 3. When the vibration system 3 moves downward to below the initial position, the direction of the strain recovery force of the vibration system 3 is upward. At this time, the first attraction between the first magnetic attraction part 323 and the second magnetic attraction part 41 is smaller than the second attraction between the first magnetic attraction part 323 and the magnetic circuit system 2. The resultant force of the first attraction and the second attraction is downward and smaller than the strain recovery force of the vibration system 3. At this time, the resultant force of the first attraction and the second attraction acts on the vibration system 3 to offset part of the strain recovery force of the vibration system 3.

[0096] It should be noted that the first attraction between the first magnetic attraction part 323 and the second magnetic attraction part 41, and the second attraction between the first magnetic attraction part 323 and the magnetic circuit system 2 will change with the position change of the vibration system 3. The resultant force of the first attraction and the second attraction exerted on the first magnetic attraction part 323, that is, the static magnetic force applied to the vibration system 3, is not fixed. During the vibration process of the vibration system 3, the static magnetic force applied to the vibration system 3 is proportional to the strain recovery force of the vibration system 3. In other words, the greater the distance the vibration system 3 deviates from its initial position, the greater the static magnetic force applied to the vibration system 3. The smaller the distance the vibration system 3 deviates from its initial position, the smaller the static magnetic force applied to the vibration system 3; the static magnetic force behaves as follows. Figure 17 shown.

[0097] Specifically, the system stiffness Kms consists of two parts: the stiffness Km of the vibration system 3 and the stiffness Kb of the cavity, that is, Kms=Km+Kb. Taking into account that the static magnetic force is related to the position of the vibration system 3, similar to the system stiffness Kms, the stiffness generated by the static magnetic force is defined as Kt, Kt=static magnetic force / displacement in the vibration direction. At this time, the total stiffness of the system becomes: Kms=Km+Kb-Kt, where Kms is the system stiffness, Km is the stiffness of the vibration system 3, and Kb is the cavity stiffness. At this time, as the displacement increases, the system stiffness decreases, that is, the larger the amplitude, the "softer" the system, and the "match" with the BL(x) curve trend, and the low-frequency performance is higher, such as Figure 18 and Figure 19 shown.

[0098] Therefore, by introducing the first magnetic attraction part 323 into the vibration system 3, the vibration system 3 is affected by the static magnetic force of the magnetic circuit system 2 and the second magnetic attraction part 41, and the stiffness of the vibration system 3 is reduced by the static magnetic force, so that the compliance of the vibration system 3 is better, and the amplitude of the vibration system 3 can be increased, thereby improving the low-frequency effect of the sound-generating device 100.

[0099] That is, the technical solution of the present invention is to provide a magnetic material coating as a first magnetic part 323 on the skeleton 32 of the vibration system 3 of the sound-generating device 100, and to provide a support member 4 on the side of the vibration system 3 facing away from the magnetic circuit system 2, and to provide a second magnetic part 41 on the support member 4, so that there is a first attraction force between the first magnetic part 323 and the second magnetic part 41, and a second attraction force between the first magnetic part 323 and the magnetic circuit system 2. In this way, the first magnetic part 323 is utilized to interact with the second magnetic part 41 of the support member 4 and the magnetic circuit system 2 respectively, and a static magnetic force is introduced into the vibration system 3, thereby effectively reducing the strain recovery force of the vibration system 3 during movement, and reducing the stiffness of the vibration system 3 by the static magnetic force, so that the compliance of the vibration system 3 is better, thereby greatly improving the low-frequency effect of the sound-generating device 100.

[0100] In the present invention, the voice coil 33 and the centering support 34 are connected by the skeleton 32 in the vibration system 3. With this arrangement, there is no need to extend the centering support 34 to the position of the voice coil 33, so that the magnetic circuit system 2 does not need to avoid the centering support 34 in the vibration direction of the vibration system 3, thereby increasing the magnet setting volume of the magnetic circuit system 2, increasing the magnetic field strength of the magnetic circuit system 2 acting on the vibration system 3, and increasing the BL value of the product, thereby improving the sensitivity of the sound-generating device 100, thereby improving the performance of the sound-generating device 100.

[0101] See also Figure 1 In one embodiment, the first magnetic portion 323 is provided on the surface of the skeleton 32 facing the second magnetic portion 41 ; and / or, the first magnetic portion 323 is provided on the surface of the skeleton 32 facing the magnetic circuit system 2 .

[0102] In this embodiment, the first magnetic attraction portion 323 can be set on the surface of the skeleton 32 facing the magnetic circuit system 2, or on the surface of the skeleton 32 facing away from the magnetic circuit system 2, or a magnetic material coating can be set on both the surface of the skeleton 32 facing the magnetic circuit system 2 and the surface of the skeleton 32 facing away from the magnetic circuit system 2 to increase the static magnetic force acting on the vibration system 3, which is not limited here.

[0103] See also Figure 1 and Figure 4 In one embodiment, the skeleton 32 includes a main body structure 321 and at least two connecting structures 322. The main body structure 321 is connected to the diaphragm 31. One end of the connecting structure 322 is connected to the main body structure 321. The other end of the connecting structure 322 is bent and extended in a direction away from the diaphragm 31 to be connected to the centering support plate 34. The magnetic material coating is provided on the surface of the main body structure 321.

[0104] In this embodiment, the skeleton 32 includes a main body structure 321 connected to the diaphragm 31 and at least two connecting structures 322 connected to the main body structure 321. The main body structure 321 can be an integrally formed structure or can be formed by connecting at least two separate structures. Two, three, four, or more connecting structures 322 can be provided, and each connecting structure 322 is respectively connected to the centering support plate 34. Optionally, the connecting structures 322 of the skeleton 32 are evenly distributed along the circumference of the main body structure 321. The connecting structure 322 can be integrally formed with at least a portion of the main body structure 321. For example, the skeleton 32 can be an integrally formed structure as a whole, or the main body structure 321 can include at least two mutually connected structures, and the connecting structure 322 can be integrally formed with a portion of the main body structure 321. In addition, the connecting structure 322 can be provided separately from the main body structure 321, and the connecting structure 322 can be connected to the main body structure 321. In some embodiments, part of the connection structure 322 can be integrally formed with the main body structure 321, and another part of the connection structure 322 and the main body structure 321 can be configured as a split structure connected to each other. Taking the configuration of two connection structures 322 as an example, one connection structure 322 is integrally formed with the main body structure 321, and the other connection structure 322 and the main body structure 321 are configured as a split structure connected to each other.

[0105] In this embodiment, a magnetic material coating is provided on the surface of the main body structure 321 as the first magnetic attraction portion 323, so that the static magnetic force acting on the first magnetic attraction portion 323 can better act on the middle area of ​​the diaphragm 31, so that the vibration system 3 is subjected to force balance and polarization problems are avoided.

[0106] See also Figure 4 In one embodiment, the main body structure 321 and the connecting structure 322 are integrally formed.

[0107] In this embodiment, the skeleton 32 can be integrally formed, or the main body structure 321 can be comprised of at least two interconnected parts, with the connecting structure 322 integrally formed with one portion of the main body structure 321. The integrally formed connection between the main body structure 321 and the connecting structure 322 increases the strength of the connection between the main body structure 321 and the connecting structure 322, improves the overall structural stability of the skeleton 32, and effectively prevents separation of the main body structure 321 and the connecting structure 322. This allows the centering support 34 to stabilize the position and movement of the vibration system 3 by securing the skeleton 32.

[0108] See also Figure 8 and Figure 9 In one embodiment, the main body structure 321 and the connection structure 322 are separate structures connected to each other.

[0109] This arrangement allows the main body structure 321 and the connecting structure 322 to be prepared separately, which facilitates the processing of the main body structure 321 and the connecting structure 322, so as to facilitate structural design on the main body structure 321 and the connecting structure 322 respectively; in addition, the main body structure 321 and the connecting structure 322 can also be made of different materials to meet different needs. For example, the main body structure 321 can be made of plastic material, and the connecting structure 322 can be made of metal material for electrical connection with the lead portion 331 of the voice coil 33 and the centering support plate 34.

[0110] The connection between the main body structure 321 and the connection structure 322 may be by bonding, welding, or the like, which is not limited here.

[0111] See also Figures 1 to 3 In one embodiment, the sound-generating device 100 has two short sides and two long sides that are oppositely arranged. The skeleton 32 includes two connecting structures 322 , and the two connecting structures 322 are respectively arranged on the two short sides or the two long sides.

[0112] In this embodiment, the sound-generating device 100 is configured in a roughly square shape, with the vibration system 3 and magnetic circuit system 2 all configured in a square or approximately square structure. The sound-generating device 100 has two opposing short sides and two opposing long sides. The skeleton 32 is provided with two connecting structures 322, located on either side of the main body structure 321. The two connecting structures 322 are symmetrically arranged to connect to the centering support 34. In this case, the two connecting structures 322 can be positioned in corresponding regions of the two short sides, or in corresponding regions of the two long sides. This arrangement ensures that the skeleton 32 is evenly supported by the centering support 34. During vibration of the vibration system 3, the elastic force exerted by the centering support 34 on the voice coil 33 and diaphragm 31 is relatively uniform, resulting in a more stable vibration process and reduced risk of polarization. Furthermore, there is no need to provide an excessive number of connecting structures 322 on the skeleton 32, simplifying the skeleton 32 structure and making the overall structure more concise and easier to install.

[0113] See also Figures 1 to 4 In one embodiment, a recessed portion 3211 is provided on one side of the main body structure 321 facing the second magnetic portion 41 . The recessed portion 3211 is formed by the skeleton 32 being recessed toward the central magnetic portion 21 , and the first magnetic portion 323 is provided in the recessed portion 3211 .

[0114] In this embodiment, a recessed portion 3211 is provided on the side of the main body structure 321 facing the first magnetic portion 323. The recessed portion 3211 is generally a groove structure. The provision of the recessed portion 3211 can increase the gap between the first magnetic portion 323 and the second magnetic portion 41, thereby increasing the vibration space for the vibration system 3 to move toward the second magnetic portion 41, reducing the risk of interference between the vibration system 3 and the second magnetic portion 41, and facilitating an increase in the amplitude of the vibration system 3, thereby improving the low-frequency effect and performance of the sound-generating device 100. Optionally, the first magnetic portion 323 can be provided on the surface of the recessed portion 3211 facing the second magnetic portion 41, or on the surface of the recessed portion 3211 facing the magnetic circuit system 2, or can be embedded in the recessed portion 3211. In addition, the first magnetic portion 323 can also be provided on the spherical top portion 325 provided on the recessed portion 3211, which will not be described in detail here.

[0115] See also Figure 7 In one embodiment, the main body structure 321 is provided with a hollow hole 3212 , and the skeleton 32 further includes a ball top 325 , which is provided on the main body structure 321 and covers the hollow hole 3212 , and the first magnetic portion 323 is provided on the ball top 325 .

[0116] In this embodiment, the portion of the skeleton 32 stacked with the diaphragm 31 is composed of a main body structure 321 and a spherical top portion 325. The spherical top portion 325 covers the hollow hole 3212 opened in the main body structure 321. The spherical top portion 325 and the main body structure 321 can be connected by bonding or other methods to ensure a sealed connection between the spherical top portion 325 and the main body structure 321, thereby preventing air leakage at the hollow hole 3212. The spherical top portion 325 can be a planar structure or have a convex curved surface. A first magnetic attraction portion 323 is provided on the spherical top portion 325. The first magnetic attraction portion 323 can be provided on the surface of the spherical top portion 325 facing the second magnetic attraction portion 41, on the surface of the spherical top portion 325 facing the magnetic circuit system 2, or embedded inside the spherical top portion 325. Alternatively, the spherical top portion 325 can be made of a magnetically conductive material, so that the spherical top portion 325 serves as the first magnetic attraction portion 323.

[0117] In this embodiment, by providing a separate spherical top portion 325 and a main body structure 321, it is easy to control the location and area of ​​the first magnetic attraction portion 323, thereby facilitating the control of the magnitude of the static magnetic force acting on the vibration system 3 to meet different product performance requirements. In addition, with this configuration, the main body structure 321 can also be configured with other materials to meet performance requirements. For example, the main body structure 321 can be configured with a metal material to improve structural strength, and in some embodiments, this can also meet electrical conductivity requirements. Alternatively, the main body structure 321 can be configured with plastic or other materials to achieve at least one of the following effects: reducing product quality, simplifying the structure, and facilitating manufacturing.

[0118] See also Figure 2 In one embodiment, a portion of the main body structure 321 is recessed and extended toward the direction close to the magnetic circuit system 2 to form a connecting frame 3213 , and one end of the voice coil 33 close to the diaphragm 31 is connected to the connecting frame 3213 .

[0119] In this embodiment, a connecting bracket 3213 is provided on the surface of the main body structure 321 facing the voice coil 33. The connecting bracket 3213 can be formed by recessing the entire area of ​​the main body structure 321 corresponding to the contour of the voice coil 33 toward the voice coil 33, thereby forming a corresponding recessed area 213 on the surface of the main body structure 321 facing away from the voice coil 33. Alternatively, the connecting bracket 3213 can simply be a raised structure formed on the surface of the main body structure 321 facing the voice coil 33 to match the contour of the voice coil 33, while the surface of the main body structure 321 facing away from the voice coil 33 can remain flat. The provision of the connecting bracket 3213 adjusts the relative position of the voice coil 33 and the magnetic gap 24 in the vibration direction, positioning the voice coil 33 in an area with denser magnetic flux lines, thereby improving the BL value.

[0120] See also Figure 1 and Figure 16 In one embodiment, the edge magnetic portion 22 includes a stacked edge magnet 221 and an edge magnetic conductive plate 222, the edge magnetic conductive plate 222 being arranged on the side of the edge magnet 221 facing the vibration system 3; the centering support plate 34 is arranged on the side of the edge magnetic conductive plate 222 facing away from the diaphragm 31, and there is a gap 223 between at least part of the edge magnetic conductive plate 222 and the outer shell 1, and the connecting structure 322 is passed through the gap 223.

[0121] In this embodiment, the side magnetic portion 22 in the magnetic circuit system 2 includes a side magnet 221 and a side magnetic conductive plate 222. The side magnetic conductive plate 222 is arranged on the side of the side magnet 221 facing the vibration system 3, and the side magnet 221 and the side magnetic conductive plate 222 are both arranged around the central magnetic portion 21; the setting of the side magnetic conductive plate 222 can have a magnetic gathering effect on the magnetic flux lines of the magnetic circuit system 2 facing the vibration system 3, so that the magnetic field lines on the side of the vibration system 3 are concentrated, thereby reducing leakage magnetic flux and improving the magnetic field strength.

[0122] Along the vibration direction of the vibration system 3, the centering support 34 is located on the side of the side magnetic plate 222 facing away from the diaphragm 31. The outer edges of the side magnetic plate 222 can be spaced apart from the housing 1 to form a notch 223. Alternatively, a portion of the outer edge of the side magnetic plate 222 can be connected to the housing 1, while another portion of the outer edge of the side magnetic plate 222 is spaced apart from the housing 1 to form a notch 223. Alternatively, the notch 223 can be provided on the side magnetic plate 222. The connecting structure 322 of the skeleton 32 passes through the notch 223 and connects to the centering support 34. This arrangement eliminates the need to position the centering support 34 on the side of the magnetic circuit system 2 facing the diaphragm 31. In this case, the magnetic circuit system 2 does not need to avoid the centering support 34 on the side adjacent to the diaphragm 31. Instead, the centering support 34 can be extended toward the side closer to the diaphragm 31 to increase the volume of the magnet in the magnetic circuit system 2, thereby increasing the magnetic field strength and thus improving the BL value. In some embodiments, this arrangement can also reduce the distance between the magnetic circuit system 2 and the diaphragm 31, thereby reducing the thickness of the sound-generating device 100.

[0123] See also Figure 16 In one embodiment, the side magnetic conductive plate 222 is integrally provided with the housing 1 .

[0124] In this embodiment, the side magnetic conductive plate 222 can be integrally injection molded with the outer shell 1. For example, the side magnetic conductive plate 222 is placed in a mold used for injection molding the outer shell 1, so that the outer shell 1 and the side magnetic conductive plate 222 can be connected when the outer shell 1 is injection molded. This connection method makes the connection strength between the side magnetic conductive plate 222 and the outer shell 1 higher, and the overall structural stability is good and not easy to separate.

[0125] See also Figure 1 In one embodiment, the side magnetic plate 222 and the housing 1 are separate, interconnected structures. The side magnetic plate 222 can be secured to the housing 1 by bonding, snapping, screwing, or other methods. This arrangement allows the side magnetic plate 222 and the housing 1 to be formed separately, facilitating fabrication and providing flexible assembly.

[0126] See also Figure 16 In one embodiment, a first avoidance opening 224 is provided on the side of the side magnetic conductive plate 222 facing the notch 223; the setting of the first avoidance opening 224 can reduce the risk of interference of the skeleton 32 with the side magnetic conductive plate 222 when the vibration system 3 vibrates, reduce interference, improve the stability of the vibration process of the vibration system 3, and avoid damage caused by collision or friction between the skeleton 32 and the side magnetic conductive plate 222.

[0127] See also Figure 3In one embodiment, a second avoidance opening 225 is provided on the edge of the side magnet 221 for avoiding the connection structure 322. The provision of the second avoidance opening 225 can reduce the risk of interference of the side magnet 221 on the skeleton 32 when the vibration system 3 vibrates, reduce interference, improve the stability of the vibration process of the vibration system 3, and avoid damage caused by collision or friction between the skeleton 32 and the side magnet 221. Optionally, a first avoidance opening 224 can be provided on the side magnetic plate 222, and a second avoidance opening 225 can be provided on the side magnet 221. The first avoidance opening 224 and the second avoidance opening 225 are provided correspondingly, thereby avoiding collision or friction between the skeleton 32 and the side magnetic portion 22 and affecting the normal operation of the vibration system 3.

[0128] See also Figure 10 and Figure 11 In one embodiment, the voice coil 33 includes a voice coil body and a lead portion 331 connected to the voice coil body. The voice coil body is connected to the frame 32. The connecting structure 322 includes a first extension portion 3221 and a second extension portion 3222. The two ends of the first extension portion 3221 are respectively connected to the main structure 321 and the second extension portion 3222. At least a portion of the first extension portion 3221 extends along the vibration direction of the vibration system 3. The second extension portion 3222 is arranged at an angle to the first extension portion 3221 and is connected to the centering support piece 34. The lead portion 331 is arranged in line along the connecting structure 322. The lead portion 331 includes a first lead 3311 routed along the first extension portion 3221 and a second lead 3312 routed along the second extension portion 3222. The centering support piece 34 is provided with a conductive portion, and the second lead 3312 is connected to the conductive portion.

[0129] In this embodiment, the voice coil 33 includes a voice coil body and a lead portion 331 extending outward from the voice coil body. One end of the voice coil body is connected to the frame 32, and the other end is arranged corresponding to the magnetic gap 24 of the magnetic circuit system 2. The lead portion 331 is electrically connected to the conductive portion of the centering support 34. The conductive portion can be a soldering pad provided on the centering support 34. This allows the voice coil 33 to be connected to an external circuit through the centering support 34, eliminating the need to extend the lead portion 331 outward, thereby facilitating electrical connection between the voice coil 33 and the external circuit. The centering support 34 can be configured as a conductive material such as metal, or a circuit layer can be provided on or within the centering support 34. The conductive portion can be a soldering pad provided on the centering support 34. The connection between the lead portion 331 and the conductive portion can be achieved by bonding with a conductive adhesive 35 or by soldering. There are usually two lead parts 331 , corresponding to two electrodes respectively. Two independent conductive parts can be provided on the centering support piece 34 , or two centering support pieces 34 can be provided to connect the two lead parts 331 respectively.

[0130] Among them, the connection structure 322 of the skeleton 32 includes a first extension portion 3221 and a second extension portion 3222 set at an angle. The first extension portion 3221 can be set as a straight extension structure, so that one end of the first extension portion 3221 is connected to the main body structure 321, and the other end extends toward the centering support piece 34 in a direction away from the diaphragm 31. The second extension portion 3222 is bent relative to the first extension portion 3221 and connected to the centering support piece 34; in some embodiments, the first extension portion 3221 can also be set as a bent structure, including a first section extending along the planar direction of the diaphragm 31 and a second section extending along the vibration direction. One end of the first section is connected to the main body structure 321, and the second section extends from the first section in a direction away from the diaphragm 31 and is connected to the centering support piece 34. Optionally, when the connection structure 322 and the main body structure 321 are set as mutually connected split structures, a third extension portion 3223 extending along a partial circumference of the main body structure 321 can be set at one end where the first extension portion 3221 is connected to the main body structure 321, so that the third extension portion 3223 is connected to the main body structure 321, thereby increasing the connection area and improving the connection strength.

[0131] In this embodiment, the lead portion 331 of the voice coil 33 includes a first lead 3311 and a second lead 3312 connected to each other. The first lead 3311 is arranged in line along the first extension portion 3221, and the second lead 3312 is arranged in line along the second extension portion 3222. Therefore, the lead portion 331 can be directly electrically connected to the conductive portion on the centering support plate 34 without providing a conductive circuit on the skeleton 32, thereby simplifying the structural design of the skeleton 32. Moreover, the skeleton 32 can be made of a lighter insulating material, thereby reducing the overall weight of the vibration system 3 and improving the vibration sensitivity of the vibration system 3.

[0132] Furthermore, the lead portion 331 of the voice coil 33 is arranged inline along the connecting structure 322. The lead portion 331 does not directly cross over the magnetic circuit system 2, so the magnetic circuit system 2 does not need to avoid the lead portion 331 in the vibration direction of the vibration system 3. This can increase the installation volume of the magnet in the magnetic circuit system 2, which is conducive to increasing the magnetic field strength of the magnetic circuit system 2 acting on the vibration system 3, thereby improving the BL value of the product and the acoustic performance of the sound-generating device 100. In addition, the lead portion 331 can also move synchronously with the connecting structure 322 during the vibration of the vibration system 3, thereby avoiding the problem of the lead portion 331 and the connecting structure 322 colliding and hitting the wire, ensuring that the lead portion 331 is stably connected to the centering support 34. The structural design is ingenious and reasonable, and the acoustic performance of the sound-generating device 100 is improved and relatively stable.

[0133] Optionally, the second lead 3312 and the second extension 3222 can be spaced apart along the vibration direction of the vibration system 3, so that the second lead 3312 and the second extension 3222 are respectively connected to opposite sides of the centering support 34. The second lead 3312 can also be provided on the side of the second extension 3222, so that the second lead 3312 and the second extension 3222 are connected to the same side of the centering support 34.

[0134] See also Figure 12 In one embodiment, the voice coil 33 includes a voice coil body and a lead portion 331 connected to the voice coil body. The voice coil body is connected to the skeleton 32. The skeleton 32 also includes a conductive layer 324. The centering support plate 34 is provided with a conductive portion. The lead portion 331 and the conductive portion are electrically connected to the conductive layer 324 respectively.

[0135] In this embodiment, a conductive layer 324 is provided on the frame 32, so that the lead portion 331 of the voice coil 33 and the centering support 34 are respectively electrically connected to the conductive layer 324. As a result, the lead portion 331 of the voice coil 33 is electrically connected to the centering support 34 through the conductive layer 324, making the electrical connection between the lead portion 331 and the centering support 34 more convenient. Furthermore, this arrangement eliminates the need for a long lead portion 331 from the voice coil 33, thus avoiding interference between the lead portion 331 and other components due to an excessively long lead portion 331. This ensures stable movement of the vibration system 3, improves performance stability, and prevents breakage due to an excessively long lead portion 331. The lead portion 331 and the frame 32 can be connected by bonding with a conductive adhesive 35 or by welding. Optionally, the conductive portion may be a pad provided on the centering support 34. The centering support 34 and the frame 32 may also be connected by bonding or welding using a conductive adhesive 35. Alternatively, the centering support 34 and the frame 32 may be connected in a manner similar to a male-female connector, which is not limited here. Alternatively, the conductive layer 324 may be formed by providing a metal wire, a metal conductive sheet, or a conductive film on the surface of the frame 32. Alternatively, the conductive layer 324 may be formed by providing a metal wire or a metal conductive sheet within the insulating frame 32.

[0136] The voice coil 33 typically has two lead portions 331, corresponding to the two electrodes. In this embodiment, two independent conductive portions can be provided on the same centering support 34. When at least two centering support 34 are provided, conductive portions can also be provided on at least two of them. The conductive layer 324 on the bobbin 32 forms two independent conductive circuits, each electrically connected to a lead portion 331 and a centering support 34. The two conductive circuits can be formed on two connecting structures 322 or positioned at different locations along the thickness of the bobbin 32. For example, the two conductive circuits can be positioned on different surfaces of the bobbin 32 facing each other in the vibration direction, or one conductive circuit can be positioned on the surface of the bobbin 32 while the other is embedded inside the bobbin 32. It should be noted that in this embodiment, the conductive layer 324 can be provided only on the connecting structures 322, or a portion of the conductive layer 324 can be positioned on the main structure 321. The specific method is described below and is not detailed here.

[0137] See also Figure 12 In one embodiment, the conductive layer 324 is provided on the connection structure 322. In this case, the connection structure 322 can be configured as an insulating member made of plastic or other insulating materials, or as a metal member; the conductive layer 324 can be provided on the surface of the connection structure 322, or it can be provided within the connection structure 322; for example, a conductive film can be provided on the surface of the connection structure 322 as the conductive layer 324. When the connection structure 322 is configured as an insulating material such as plastic, a metal wire or a metal conductive sheet can be provided within the connection structure 322 to form the conductive layer 324. It should be noted that in this embodiment, the main body structure 321 can be configured as an insulating material or as a conductive material such as metal. The lead portion 331 of the voice coil 33 can extend to the connection structure 322 and be electrically connected to the conductive layer 324. The connection between the lead portion 331 and the connection structure 322 can be achieved by bonding with a conductive adhesive 35 or by welding. Similarly, the centering support piece 34 and the connection structure 322 can also be connected by bonding or welding with the conductive adhesive 35. In addition, the centering support piece 34 and the connection structure 322 can also be connected to each other in a manner similar to male and female plug-in connection, which is not limited here.

[0138] In one embodiment, the conductive layer 324 is disposed on the main structure 321 and the connecting structure 322. With this arrangement, the conductive layer 324 extends from the main structure 321 to the connecting structure 322. The conductive layer 324 located on the connecting structure 322 can be electrically connected to the centering support 34, while the conductive layer 324 located on the main structure 321 can be used to electrically connect to the lead portion 331. This eliminates the need for the lead portion 331 to extend to the connecting structure 322, shortens the length of the lead portion 331, and facilitates connection and conduction between the voice coil 33 and the bobbin 32. The lead portion 331 and the main structure 321 can be connected by bonding with conductive adhesive 35 or by soldering. Similarly, the centering support 34 and the connecting structure 322 can also be connected by bonding with conductive adhesive 35 or by welding. Alternatively, the centering support 34 and the connecting structure 322 can be connected in a manner similar to a male-female connector, which is not limited here.

[0139] See also Figure 12 In one embodiment, the conductive layer 324 is disposed on the outer surface of the skeleton 32; the conductive layer 324 can be disposed only on the outer surface of the connecting structure 322, or on the outer surface of the connecting structure 322 and at least a portion of the main body structure 321; the skeleton 32 can be configured as an integrally formed metal structure or plastic structure. Providing the conductive layer 324 on the outer surface of the skeleton 32 can reduce the difficulty of disposing the conductive layer 324 and facilitate electrical connection between the conductive layer 324 and the centering support 34 and the lead portion 331. When two conductive circuits are disposed on the surface of an integrally formed metal structure, an insulating layer needs to be provided between the conductive layer 324 and the metal structure to prevent the two conductive circuits formed by the conductive layer 324 from being electrically connected through the metal component and causing a short circuit.

[0140] In one embodiment, at least a portion of the skeleton 32 is formed as a plastic structure, and the conductive layer 324 is formed as a conductive circuit layer injection-molded within the plastic structure. Alternatively, the connecting structure 322 of the skeleton 32 may be configured as a plastic structure, and the conductive layer 324 may be disposed on the connecting structure 322. Alternatively, the entire skeleton 32 may be configured as a plastic structure, and the conductive layer 324 may be disposed only in the region of the connecting structure 322, or may be disposed separately on the main structure 321 and the connecting structure 322. Providing the conductive layer 324 within the plastic structure prevents the conductive layer 324 from being directly exposed to the outside and easily damaged, resulting in short circuits or poor conduction. It also prevents problems such as leakage, thereby improving safety. Alternatively, the conductive structure may be configured to extend from the surface of the skeleton 32 to the conductive circuit layer, allowing the lead portion 331 to be electrically connected to the conductive circuit layer via the conductive structure. Similarly, the centering support 34 may be electrically connected to the conductive circuit layer via the conductive structure. For example, a via hole may be opened on the surface of the skeleton 32 , and a conductive coating may be provided on the hole wall of the via hole, or the via hole may be filled with a conductive material, which is not specifically limited here.

[0141] In one embodiment, the voice coil 33 includes a voice coil body and a lead portion 331 connected to the voice coil body. The voice coil body is connected to the frame 32, and the centering support plate 34 is provided with a conductive portion. The main body structure 321 is an insulating material part, and the connecting structure 322 is a metal part. The connecting structure 322 is electrically connected to the conductive portion and the lead portion 331 respectively.

[0142] In this embodiment, the connecting structure 322 is configured as a metal component, making it conductive. The two lead portions 331 of the voice coil 33 are electrically connected to the two conductive portions of the centering support 34 via the two connecting structures 322, respectively. This facilitates connection and makes the connecting structure 322 easy to manufacture. Furthermore, the main body structure 321 is configured as an insulating material, which prevents the two connecting structures 322 connected to the main body structure 321 from being electrically connected to each other through the main body structure 321, thereby preventing short circuits.

[0143] See also Figure 13 and Figure 14 In one embodiment, the skeleton 32 includes two components 326 made of metal material, at least part of the connecting structure 322 and part of the main body structure 321 form the component 326, the two components 326 are arranged separately, and each component 326 is electrically connected to the conductive part and the lead part 331 respectively.

[0144] In this embodiment, the main body structure 321 comprises at least two separate components, each of which is connected to the two connecting structures 322 in a one-to-one relationship, thereby forming two components 326. The separate components and connecting structure 322 can be integrally formed or interconnected separate structures. Both the separate components and connecting structure 322 are made of metal, and when connected to form component 326, the separate components and connecting structure 322 are electrically conductive to each other. The two lead portions 331 of the voice coil 33 are electrically connected to the centering support 34 via the two components 326, respectively. This facilitates connection between the lead portions 331 and the centering support 34, eliminating the need for excessively long lead portions 331 and preventing interference with other structures. It should be noted that in this embodiment, the two components 326 can be bonded together using insulating adhesive. Alternatively, the main body structure 321 can include an insulating portion, with the two components 326 connected to the insulating portion, thereby preventing electrical shorting between the two components 326.

[0145] See also Figure 1 and Figure 3 In one embodiment, there are two centering supports 34, one of which is provided with two conductive portions; or, each centering support 34 is provided with a conductive portion; the voice coil 33 includes a voice coil body and two lead portions 331 connected to the voice coil body, the voice coil body is connected to the frame 32, and each lead portion 331 is electrically connected to a conductive portion.

[0146] In this embodiment, two centering supports 34 are provided in the vibration system 3. These supports 34 are disposed on opposite sides of the frame 32. The two support arms 34 can be connected end-to-end to form a ring structure, or they can be spaced apart. The voice coil 33 is typically provided with two lead portions 331 corresponding to the two electrodes. In this embodiment, a conductive portion can be provided on each of the two support arms 34, so that the two lead portions 331 of the voice coil 33 are electrically connected to the two conductive portions in a one-to-one correspondence. Alternatively, one of the support arms 34 can be provided with two independent conductive portions. For example, the support arm 34 can include an insulating body and two conductive portions, with the two conductive portions formed on different surfaces of the insulating body or spaced apart on the same surface of the insulating body. In either case, the problem of short circuit caused by electrical connection between the two conductive portions can be avoided. The lead portion 331 and the conductive portion may be electrically connected in such a way that the lead portion 331 is directly electrically connected to the conductive portion, or the lead portion 331 and the conductive portion are electrically connected to the skeleton 32 respectively. The specific implementation method is referred to the above embodiment and will not be repeated here.

[0147] Optionally, the two centering supports 34 are arranged at intervals. For example, the sound-emitting device 100 has two short sides and two long sides that are arranged opposite to each other, so that the two centering supports 34 can be respectively arranged on the two short sides or the two long sides. This arrangement can not only make the vibration system 3 bear the force evenly, but also allow the magnetic circuit system 2 to extend in the direction where the centering support 34 is not set, thereby increasing the width of the magnetic circuit system 2, which is beneficial to increasing the magnetic field strength generated by the magnetic circuit system 2, thereby increasing the BL value of the product and improving the acoustic performance of the product.

[0148] See also Figure 1 and Figure 15 In one embodiment, a receiving space 233 is defined between the shell 1 and the magnetic circuit system 2, and the centering support piece 34 includes a first connecting portion 341, an elastic portion 342 and a second connecting portion 343 that are connected to each other. The first connecting portion 341 is connected to the shell 1, the elastic portion 342 and the second connecting portion 343 are located in the receiving space 233, and the skeleton 32 is connected to the second connecting portion 343.

[0149] In this embodiment, at least a portion of the magnetic circuit system 2 is spaced apart from the inner sidewall of the housing 1 to form an accommodation space 233. The centering support 34 is installed in the accommodation space 233, so that the magnetic circuit system 2 does not need to avoid the centering support 34 in the vibration direction of the vibration system 3. This helps to increase the size of the magnetic circuit system 2 in the vibration direction of the vibration system 3, improve the magnetic field strength, and thus increase the BL value of the product. The centering support 34 includes a first connecting portion 341, an elastic portion 342, and a second connecting portion 343. The first connecting portion 341 is connected to the housing 1, and the elastic portion 342 extends toward the magnetic circuit system 2. The second connecting portion 343 is located at the end of the elastic portion 342 away from the first connecting portion 341 and is connected to the frame 32. The elastic portion 342 can be configured as a straight-extending elastic cantilever or as a bent elastic arm, so that the elastic portion 342 can bend and deform when the vibration system 3 vibrates.

[0150] Optionally, the elastic portion 342 includes two first elastic arms 3421, two second elastic arms 3422 and a third elastic arm 3423, one end of the first elastic arm 3421 is connected to the first connecting portion 341, the second elastic arm 3422 extends from the other end of the first elastic arm 3421 to the first connecting portion 341, the two ends of the third elastic arm 3423 are respectively connected to one end of the two second elastic arms 3422 close to the first connecting portion 341, and the second connecting portion 343 is arranged on the third elastic arm 3423.

[0151] See also Figure 3 In one embodiment, there are two centering supports 34 , which are disposed on opposite sides of the frame 32 .

[0152] In this embodiment, the vibration system 3 includes two centering supports 34, one located on either side of the frame 32. These supports provide support for the frame 32 on opposite sides of the frame 32, ensuring uniform force distribution and maintaining positional balance on the vibration system 3, thus avoiding polarization issues. Furthermore, in some embodiments, the centering supports 34 are located in the accommodation space 233 defined by the side of the magnetic circuit system 2 and the housing 1. This allows the magnetic circuit system 2 to extend in the direction where the centering supports 34 are not provided, thereby increasing the width of the magnetic circuit system 2. This helps to increase the magnetic field strength generated by the magnetic circuit system 2, thereby improving the product's BL value and acoustic performance.

[0153] See also Figures 1 to 3 In one embodiment, the magnetic circuit system 2 further includes a magnetic yoke 23, which includes a main body 231 and a bent portion 232 arranged on the outer periphery of the main body 231. The central magnetic portion 21 and the edge magnetic portion 22 are both arranged on the side of the main body 231 opposite to the vibration system 3. The bent portion 232 bends and extends relative to the main body 231 toward the direction close to the vibration system 3. The bent portion 232, the housing 1 and the edge magnetic portion 22 jointly define an accommodating space 233 for arranging at least part of the centering support piece 34.

[0154] In this embodiment, the housing 1 has an opening on at least one side away from the vibration system 3. The magnetic circuit system 2 also includes a magnetic yoke 23 covering the opening. The magnetic yoke 23 includes a main body 231 disposed on the side of the central magnetic portion 21 and the side magnetic portion 22 facing away from the vibration system 3, and a bent portion 232 bent relative to the main body 231. The bent portion 232 extends from the main body 231 toward the side closer to the vibration system 3 and is disposed opposite the housing 1. The bent portion 232 can be connected to the housing 1 at one end away from the main body 231. The magnetic yoke 23 can be used to guide the transmission of magnetic flux lines, enclosing the magnetic flux lines generated by the magnetic circuit system 2 within the sound-generating device 100, reducing magnetic leakage, and increasing the magnetic field strength acting on the voice coil 33, thereby facilitating an increase in the BL value of the product and enhancing the acoustic performance of the product.

[0155] In this embodiment, the housing 1 and the bent portion 232 are spaced apart from at least a portion of the edge magnet portion 22, so that the bent portion 232, the housing 1, and the edge magnet portion 22 collectively define a receiving space 233. At least a portion of the centering support 34 can be disposed within the receiving space 233. For example, the edge of the centering support 34 can be connected between the bent portion 232 and the housing 1, with a portion of the centering support 34 located within the receiving space 233 for connection to the frame 32. Alternatively, the entire centering support 34 can be disposed within the receiving space 233, which is not limited herein. The bent portion 232 can be disposed around the main body 231 or located only at a portion of the edge of the main body 231.

[0156] See also Figures 1 to 3In one embodiment, the central magnetic portion 21 includes a stacked central magnet 211 and a central magnetic conductive plate 212. The central magnetic conductive plate 212 is located on the side of the central magnet 211 facing the vibration system 3. Along the vibration direction of the vibration system 3, the central magnetic conductive plate 212 is provided with a recessed area 213 corresponding to the first magnetic attraction portion 323; wherein, part of the central magnetic conductive plate 212 is recessed in a direction away from the vibration system 3 to form the recessed area 213; or, the recessed area 213 is a through-hole structure that passes through the central magnetic conductive plate 212.

[0157] In this embodiment, the central magnetic portion 21 includes a stacked central magnet 211 and a central magnetic conductive plate 212. The central magnetic conductive plate 212 is located on the side of the central magnet 211 facing the vibration system 3. The central magnetic conductive plate 212 can concentrate the magnetic flux lines of the magnetic circuit system 2 toward the vibration system 3, thereby concentrating the magnetic field lines on the side of the vibration system 3, reducing magnetic leakage, and increasing the magnetic field strength.

[0158] Among them, a recessed area 213 is provided on the surface of the central magnetic conductive plate 212 facing away from the vibration system 3. The recessed area 213 is provided corresponding to the first magnetic attraction portion 323, which can reduce the influence of the magnetic focusing effect of the central magnetic conductive plate 212 on the second attraction force, thereby effectively increasing the magnetic attraction force between the first magnetic attraction portion 323 and the central magnet 211. It can be understood that the provision of the recessed area 213 is also conducive to avoiding the recessed portion 3211 provided on the skeleton 32. Among them, the recessed area 213 can be a through hole or notch structure that passes through the central magnetic conductive plate 212. Of course, the recessed area 213 can also be a groove structure formed by the central magnetic conductive plate 212 being recessed in the direction away from the diaphragm 31, which is not limited here.

[0159] Optionally, a portion of the central magnetic conductive plate 212 is recessed in a direction away from the diaphragm 31 to form a recessed area 213. Of course, in other embodiments, the recessed area 213 is a through-hole structure that extends through the central magnetic conductive plate 212. The central magnetic conductive plate 212 is arranged in an integral annular shape, such that the recessed area 213 is formed in the center of the central magnetic conductive plate 212. In other embodiments, the central magnetic conductive plate 212 includes multiple central magnetic conductive plates 212, and the multiple central magnetic conductive plates 212 are surrounded in an annular shape to form the recessed area 213.

[0160] In one embodiment, there is a second attraction force between the first magnetic attraction portion 323 and the central magnetic portion 21, and the magnetization direction of the second magnetic attraction portion 41 is opposite to the magnetization direction of the central magnetic portion 21; in this way, the magnetic flux lines generated by the second magnetic attraction portion 41 are opposite to the magnetic flux lines generated by the central magnetic portion 21 and repel each other, and the two parts of the magnetic flux lines pass through the voice coil 33 horizontally, thereby increasing the intensity of the magnetic flux lines acting on the voice coil 33, increasing the BL value of the product, and thereby improving the sound sensitivity of the sound-emitting device 100.

[0161] See also Figure 1In one embodiment, the second magnetic attraction portion 41 is arranged on the side of the support member 4 facing the first magnetic attraction portion 323; and / or, the second magnetic attraction portion 41 is arranged on the side of the support member 4 facing away from the first magnetic attraction portion 323; and / or, an installation cavity is provided in the support member 4, and the second magnetic attraction portion 41 is arranged in the installation cavity.

[0162] It is understood that the second magnetic portion 41 can be disposed on at least one side of the support member 4, that is, the second magnetic portion 41 can be disposed on one side or on two opposing sides of the support member 4. In this embodiment, the support member 4 has an upper surface and a lower surface disposed in opposite directions, with the lower surface facing the diaphragm 31. In this case, the second magnetic portion 41 can be disposed on the upper surface; the second magnetic portion 41 can also be disposed on the lower surface; or the second magnetic portion 41 can be disposed on both the upper and lower surfaces.

[0163] Of course, the second magnetic portion 41 can also be disposed in the support member 4, that is, the second magnetic portion 41 is embedded in the support member 4 or injection molded in the support member 4. In one embodiment, the support member 4 is provided with a mounting cavity, and the second magnetic portion 41 is disposed in the mounting cavity.

[0164] In one embodiment, at least two second magnetic portions 41 are provided, and the at least two second magnetic portions 41 are provided on the same side or different sides of the support member 4 .

[0165] In this embodiment, two, three, four, or more second magnetic portions 41 may be provided. The second magnetic portions 41 may be provided on the same side of the support member 4. For example, the plurality of second magnetic portions 41 may be provided on the upper or lower surface of the support member 4, or may be embedded in the support member 4. The second magnetic portions 41 may also be provided on different sides of the support member 4. For example, two of the second magnetic portions 41 may be provided on the upper and lower surfaces of the support member 4, respectively.

[0166] Optionally, when multiple second magnetic portions 41 are disposed on the same side of the support member 4, the multiple second magnetic portions 41 are arranged in a spliced ​​arrangement. For example, two adjacent second magnetic portions 41 among the multiple second magnetic portions 41 are arranged closely together, i.e., there is no gap. When multiple second magnetic portions 41 are disposed on the same side of the support member 4, the multiple second magnetic portions 41 are arranged in an interspaced arrangement. For example, there is a gap between two adjacent second magnetic portions 41 among the multiple second magnetic portions 41.

[0167] In one embodiment, the second magnetic portion 41 is circular, elliptical, or polygonal; that is, the shape of the second magnetic portion 41 can be circular, elliptical, triangular, square, or other polygonal structures, without limitation. To ensure a balanced magnetic attraction between the second magnetic portion 41 and the first magnetic portion 323, the structure of the second magnetic portion 41 can be symmetrical or regular, without limitation.

[0168] See also Figure 1 In one embodiment, the second magnetic portion 41 is disposed opposite the first magnetic portion 323. This arrangement allows the first magnetic portion 323 to be preferably within the magnetic field of the second magnetic portion 41, thereby increasing the first attractive force between the first magnetic portion 323 and the second magnetic portion 41. In one embodiment, a mounting groove is provided on the side of the support member 4 facing the diaphragm 31, and the second magnetic portion 41 is disposed within the mounting groove.

[0169] In one embodiment, a mounting groove is provided on a side of the support member 4 facing the diaphragm 31 , and the second magnetic portion 41 is disposed in the mounting groove.

[0170] In this embodiment, the mounting groove can be a groove structure formed by a concave groove on one side surface of the support member 4, or a concave structure formed by a concave groove on one side surface of the support member 4, so that the other side surface is raised, without limitation here. It is understood that the mounting groove can be provided on the lower surface of the support member 4. Of course, in other embodiments, the mounting groove can be provided on the upper surface of the support member 4, without limitation here.

[0171] See also Figures 1 to 3 In one embodiment, the sound-generating device 100 is provided with a front cover 42 , which is located on the side of the vibration system 3 facing away from the magnetic circuit system 2 , the front cover 42 forms a support member 4 , and the outer edge of the diaphragm 31 is connected between the front cover 42 and the housing 1 .

[0172] In this embodiment, the sound-emitting device 100 can be provided in a communication terminal device such as a mobile phone. The sound-emitting device 100 can be used as a sound-emitting unit of a handset. The front cover 42 of the sound-emitting device 100 is at least partially located on the side of the vibration system 3 facing away from the magnetic circuit system 2, so that a vibration space is formed between the front cover 42 and the vibration system 3. The periphery of the front cover 42 is connected to the periphery of the vibration system 3. In order to facilitate the smooth sound generation of the sound-emitting device 100, a sound hole 421 connected to the vibration space can be provided in the front cover 42. Optionally, the sound hole 421 is provided directly opposite the diaphragm 31. In order to prevent dust, water vapor and other debris from entering the vibration space through the sound hole 421 and affecting the performance of the sound-emitting device 100, the sound-emitting device 100 further includes a mesh 5, which covers the sound hole 421.

[0173] At the same time, the front cover 42 forms a support member 4 for installing the second magnetic part 41. The second magnetic part 41 can be set on the side of the front cover 42 facing the vibration system 3, or on the side of the front cover 42 facing away from the vibration system 3. The second magnetic part 41 can also be installed in the installation cavity formed inside the front cover 42, which is not limited here.

[0174] See also Figure 5 and Figure 6In one embodiment, the sound-generating device 100 includes a module shell 43, and the module shell 43 includes a module upper shell 431 and a module lower shell 432 that cover each other. The module upper shell 431 and the module lower shell 432 enclose an installation space 433, and the magnetic circuit system 2 and the vibration system 3 are arranged in the installation space 433. The module upper shell 431 is located on the side of the vibration system 3 facing away from the magnetic circuit system 2. The module upper shell 431 forms a support member 4, and the second magnetic attraction portion 41 is arranged on the module upper shell 431.

[0175] In this embodiment, the sound-generating device 100 is provided with a module shell 43, which forms an installation space 433 for accommodating the magnetic circuit system 2, the vibration system 3 and at least part of the other structures of the sound-generating device 100, so that the sound-generating device 100 can be used alone as a sound-generating device.

[0176] In an embodiment of the present invention, in order to facilitate the disassembly and assembly of various components in the module shell 43, the module shell 43 includes a module upper shell 431 and a module lower shell 432 that cover each other, and the module upper shell 431 and the module lower shell 432 are detachably connected; the module upper shell 431 is located on the side of the vibration system 3 away from the magnetic circuit system 2, and serves as a support member 4 for fixing the second magnetic attraction part 41. The second magnetic attraction part 41 can be arranged on the side of the module upper shell 431 facing the diaphragm 31, or on the side of the module upper shell 431 facing away from the diaphragm 31. The second magnetic attraction part 41 can also be installed in the installation cavity formed inside the module upper shell 431, which is not limited here.

[0177] In order to enable the sound-emitting device 100 to produce sound smoothly, the module upper shell 431 and the vibration system 3 cooperate with each other to form a front sound cavity. The module shell 43 is provided with a sound outlet hole connecting the front sound cavity with the outside world. The sound outlet hole connecting the front sound cavity and the outside world can be opened on the module upper shell 431, or the module upper shell 431 and the module lower shell 432 can be spaced apart at some edges to form a sound outlet hole, which is not limited here.

[0178] The present invention also proposes an electronic device, which includes a sound-emitting device 100 as in any of the aforementioned embodiments. The specific structure of the sound-emitting device 100 refers to the aforementioned embodiments. Since this electronic device adopts all the technical solutions of all the aforementioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the aforementioned embodiments, which will not be described one by one here.

[0179] The electronic device can be a mobile phone, MP3, MP4, tablet computer, earphone, wearable device, etc. In the electronic device, the sound device 100 can be assembled into the housing of the electronic device in the form of a module or in the form of a single body.

[0180] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A sound-generating device, characterized in that: include: shell; A magnetic circuit system, the magnetic circuit system comprising a central magnetic portion and side magnetic portions spaced apart from each other, wherein the central magnetic portion and the side magnetic portions are spaced apart from each other to form a magnetic gap; a vibration system disposed on one side of the magnetic circuit system, the vibration system comprising a diaphragm, a skeleton, a voice coil, and a centering support, wherein the outer edge of the diaphragm is connected to the housing, the inner edge of the diaphragm is connected to the skeleton, one end of the voice coil is connected to the skeleton, and the other end of the voice coil is arranged corresponding to the magnetic gap; the centering support is opposite to the diaphragm and spaced apart, one end of the centering support is connected to an end of the skeleton away from the diaphragm, and the other end of the centering support is connected to the housing; and a support member, at least a portion of which is located on a side of the vibration system facing away from the magnetic circuit system; In which, the skeleton is provided with a first magnetic attraction part, the first magnetic attraction part includes a magnetic material coating provided on the surface of the skeleton, the support part is provided with a second magnetic attraction part, the second magnetic attraction part is a permanent magnet, there is a first attraction force between the first magnetic attraction part and the second magnetic attraction part, there is a second attraction force between the first magnetic attraction part and the magnetic circuit system, and in a non-working state, the vibration system is located in a balanced position between the second magnetic attraction part and the magnetic circuit system under the action of the combined force of the first attraction force and the second attraction force.

2. The sound-generating device according to claim 1, wherein: The first magnetic attraction portion is provided on a surface of the frame facing the second magnetic attraction portion.

3. The sound-generating device according to claim 1, wherein: The first magnetic attraction portion is provided on a surface of the frame facing the magnetic circuit system.

4. The sound-generating device according to claim 1, wherein: The skeleton includes a main body structure and at least two connecting structures, the main body structure is connected to the diaphragm, one end of the connecting structure is connected to the main body structure, and the other end of the connecting structure is bent and extended in a direction away from the diaphragm to be connected to the centering support plate, and the magnetic material coating is provided on the surface of the main body structure.

5. The sound-generating device according to claim 4, wherein: The main body structure and the connecting structure are integrally formed; or, the main body structure and the connecting structure are separate structures connected to each other.

6. The sound-generating device according to claim 4, wherein: The sound-generating device has two short sides and two long sides that are arranged opposite to each other. The frame includes two connecting structures, and the two connecting structures are respectively arranged on the two short sides or the two long sides.

7. The sound-generating device according to claim 4, wherein: A recessed portion is provided on one side of the main body structure facing the second magnetic attraction portion. The recessed portion is formed by the skeleton being recessed toward the central magnetic portion. The first magnetic attraction portion is provided in the recessed portion.

8. The sound-generating device according to claim 4, wherein: The main body structure is provided with a hollow hole, the skeleton further includes a ball top portion, the ball top portion is provided on the main body structure and covers the hollow hole, and the first magnetic attraction portion is provided on the ball top portion.

9. The sound-generating device according to claim 4, wherein: A portion of the body structure is recessed and extends toward the direction close to the magnetic circuit system to form a connecting frame, and one end of the voice coil close to the diaphragm is connected to the connecting frame.

10. The sound-generating device according to claim 4, wherein: The edge magnet portion includes a stacked edge magnet and an edge magnetic conductive plate, wherein the edge magnetic conductive plate is provided on a side of the edge magnet facing the vibration system; The centering support plate is arranged on a side of the edge magnetic conductive plate facing away from the diaphragm, and a gap is provided between at least a portion of the edge magnetic conductive plate and the shell, and the connecting structure is passed through the gap.

11. The sound generating device according to claim 10, wherein: The side magnetic conductive plate and the shell are integrally provided; or, the side magnetic conductive plate and the shell are separate structures connected to each other.

12. The sound generating device according to claim 10, wherein: The side of the magnetic conductive plate facing the notch is provided with a first avoidance opening; And / or, the edge of the side magnet is provided with a second avoidance opening for avoiding the connecting structure.

13. The sound-generating device according to claim 4, wherein: The voice coil includes a voice coil body and a lead portion connected to the voice coil body. The voice coil body is connected to the frame. The connecting structure includes a first extension portion and a second extension portion. Two ends of the first extension portion are connected to the body structure and the second extension portion, respectively. At least a portion of the first extension portion extends along the vibration direction of the vibration system. The second extension portion is arranged at an angle to the first extension portion and is connected to the centering plate. The lead portion is arranged along the connecting structure, and includes a first lead wire routed along the first extension portion and a second lead wire routed along the second extension portion. The centering support piece is provided with a conductive portion, and the second lead wire is connected to the conductive portion.

14. The sound-generating device according to claim 4, wherein: The voice coil includes a voice coil body and a lead portion connected to the voice coil body. The voice coil body is connected to the frame. The frame also includes a conductive layer. The centering support is provided with a conductive portion. The lead portion and the conductive portion are electrically connected to the conductive layer respectively.

15. The sound generating device according to claim 14, wherein: The conductive layer is provided on the connection structure, or the conductive layer is provided on the main structure and the connection structure respectively.

16. The sound generating device according to claim 14, wherein: The conductive layer is provided on the outer surface of the frame; Alternatively, at least a portion of the skeleton is formed as a plastic structure, and the conductive layer is formed as a conductive circuit layer injection-molded inside the plastic structure.

17. The sound-generating device according to claim 4, wherein: The voice coil includes a voice coil body and a lead portion connected to the voice coil body, the voice coil body is connected to the frame, and the centering support is provided with a conductive portion; Wherein, the main body structure is an insulating material part, the connecting structure is a metal part, and the connecting structure is electrically connected to the conductive part and the lead part respectively; Alternatively, the skeleton includes two components made of metal materials, at least part of the connecting structure and part of the main body structure form the components, the two components are arranged separately, and each component is electrically connected to the conductive part and the lead part.

18. The sound-generating device according to claim 1, wherein: There are two centering supports, one of which is provided with two conductive portions; or each of the centering supports is provided with a conductive portion; The voice coil includes a voice coil body and two lead parts connected to the voice coil body. The voice coil body is connected to the frame, and each lead part is electrically connected to one of the conductive parts.

19. The sound-generating device according to claim 1, wherein: An accommodating space is defined between the housing and the magnetic circuit system, the centering arm includes a first connecting portion, an elastic portion, and a second connecting portion that are connected to each other, the first connecting portion being connected to the housing, the elastic portion and the second connecting portion being located within the accommodating space, and the frame being connected to the second connecting portion; And / or, there are two centering supports, and the two centering supports are arranged on opposite sides of the frame.

20. The sound-generating device according to claim 1, wherein: The magnetic circuit system further includes a magnetic yoke, the magnetic yoke including a main body and a bent portion provided on the outer periphery of the main body, the central magnetic portion and the edge magnetic portion are both provided on a side of the main body opposite to the vibration system, the bent portion bends and extends relative to the main body toward the vibration system, and the bent portion, the housing, and the edge magnetic portion jointly define a storage space for arranging at least a portion of the centering support plate; And / or, the central magnetic portion includes a central magnet and a central magnetic conductive plate arranged in a stacked manner, the central magnetic conductive plate is located on a side of the central magnet facing the vibration system, and along the vibration direction of the vibration system, the central magnetic conductive plate has a recessed area corresponding to the first magnetic attraction portion; Part of the central magnetic conductive plate is recessed in a direction away from the vibration system to form the recessed area; or the recessed area is a through-hole structure penetrating the central magnetic conductive plate.

21. The sound-generating device according to claim 1, wherein: There is a second attraction force between the first magnetic attraction portion and the central magnetic portion, and the magnetization direction of the second magnetic attraction portion is opposite to the magnetization direction of the central magnetic portion; And / or, the second magnetic attraction portion is circular, elliptical or polygonal; And / or, the second magnetic attraction portion is arranged opposite to the first magnetic attraction portion.

22. The sound-generating device according to claim 1, wherein: The second magnetic attraction portion is provided on a side of the support member facing the first magnetic attraction portion.

23. The sound-generating device according to claim 1, wherein: The second magnetic attraction portion is disposed on a side of the support member facing away from the first magnetic attraction portion.

24. The sound-generating device according to claim 1, wherein: An installation cavity is provided in the support member, and the second magnetic attraction portion is provided in the installation cavity.

25. The sound-generating device according to claim 1, wherein: A mounting groove is provided on a side of the support member facing the diaphragm, and the second magnetic attraction portion is arranged in the mounting groove.

26. The sound-generating device according to claim 1, wherein: There are at least two second magnetic attraction parts, and the at least two second magnetic attraction parts are arranged on the same side or different sides of the support member.

27. The sound generating device according to any one of claims 1 to 26, characterized in that The sound-generating device is provided with a front cover, which is located on the side of the vibration system facing away from the magnetic circuit system. The front cover forms the support member, and the outer edge of the diaphragm is connected between the front cover and the housing.

28. The sound generating device according to any one of claims 1 to 26, characterized in that The sound-generating device includes a module shell, which includes a module upper shell and a module lower shell covering each other, and the module upper shell and the module lower shell enclose an installation space. The magnetic circuit system and the vibration system are arranged in the installation space. The module upper shell is located on the side of the vibration system facing away from the magnetic circuit system. The module upper shell forms the support member, and the second magnetic attraction part is arranged on the module upper shell.

29. An electronic device, characterized in that: The electronic device comprises the sound emitting device as claimed in any one of claims 1 to 28.

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